US5021378A - Molded articles based on pyrogenically prepared silicon dioxide, process for their production and their use - Google Patents
Molded articles based on pyrogenically prepared silicon dioxide, process for their production and their use Download PDFInfo
- Publication number
- US5021378A US5021378A US07/488,379 US48837990A US5021378A US 5021378 A US5021378 A US 5021378A US 48837990 A US48837990 A US 48837990A US 5021378 A US5021378 A US 5021378A
- Authority
- US
- United States
- Prior art keywords
- weight
- sub
- silicon dioxide
- diameter
- pores
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 29
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000011148 porous material Substances 0.000 claims abstract description 38
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 8
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 8
- 239000010439 graphite Substances 0.000 claims abstract description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 239000001993 wax Substances 0.000 claims abstract description 7
- 229920002472 Starch Polymers 0.000 claims abstract description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004202 carbamide Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 235000019698 starch Nutrition 0.000 claims abstract description 6
- 239000008107 starch Substances 0.000 claims abstract description 6
- 235000000346 sugar Nutrition 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005496 tempering Methods 0.000 claims abstract description 5
- 239000008188 pellet Substances 0.000 claims description 9
- 239000013543 active substance Substances 0.000 claims description 3
- 235000013877 carbamide Nutrition 0.000 claims 2
- 229910018404 Al2 O3 Inorganic materials 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 229910002012 Aerosil® Inorganic materials 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 2
- 229910002016 Aerosil® 200 Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011164 primary particle Substances 0.000 description 2
- 239000005049 silicon tetrachloride Substances 0.000 description 2
- 229910002019 Aerosil® 380 Inorganic materials 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/08—Silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/613—10-100 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/635—0.5-1.0 ml/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/63—Pore volume
- B01J35/638—Pore volume more than 1.0 ml/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/647—2-50 nm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/66—Pore distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
Definitions
- the present invention relates to molded articles based on pyrogenically prepared silicon dioxide, process for their production and their use as a catalyst support or catalyst.
- Pyrogenically prepared silicon oxides are distinguished by being extremely finely divided and by a correspondingly high specific surface area, very high purity, a spherical particle shape and the lack of pores. Due to these properties, pyrogenically prepared oxides are becoming increasingly important as supports for catalysts; see D. Koth, H.. Ferch, Chem. Ing. Techn. 52, 628 (1980).
- German OLS 31 32 674 discloses a process for the production of molded articles from pyrogenically prepared oxides in which silica sol is uses as binder.
- German OLS 34 06 185 discloses a process for the production of molded bodies by using glaze frit powder as a binder and glycerol as a lubricant.
- German Patent 21 00 778 discloses employing granules based on pyrogenically prepared silicon dioxides as catalyst support used in processes for the preparation of, for example, vinyl acetate monomer.
- all mixer apparatus or mills which enable good homogenization such as, for example, paddle mixers, fluidized bed mixers, rotary mixers or airstream mixers, are suitable for carrying out the process according to the invention.
- Mixers by means of which it is possible to additionally compact the mixing material, for example plow blade mixers, chaser mills or ball mills, are particularly suitable.
- substantial drying at 80°-20° C. can be carried out so that a free-flowing powder is obtained after comminution.
- the molded articles can be produced by die stamping, eccentric pressing, extrusion or rotary pressing and in compactors.
- the shape of the molded articles can vary, for example, pellets, rods, or annular members e.g. rings. These shapes are well known in the field of catalytic supports.
- the mixture can have the following composition before pressing:
- silicon dioxide 50-90% by weight of silicon dioxide, preferably 70-80% by weight
- kaolin preferably 1-5% by weight, and/or
- pore formers such as urea, sugar or starch, preferably 10-30% by weight.
- the molded bodies can have various shapes, for example cylindrical, spherical or annular, with an external diameter or from 2 to 15 mm.
- Tempering of the molded articles is carried out by heating at 400°-1200° C. for 30 minutes to 6 hours.
- the molded articles prepared according to the invention can be used either directly as catalysts or as catalyst supports after the moldings have been impregnated, during or after their production, with a solution of a catalytically active substance and, if appropriate, have been activated by suitable after treatment.
- a catalytically active substance and, if appropriate, have been activated by suitable after treatment.
- the compositions and procedures for deposition of catalytically active substances are well known in industry.
- the molded articles made from pyrogenically prepared silicon dioxide can be used particularly well when used as the support for the catalyst used in the preparation of vinyl acetate monomer from ethylene, acetic acid and oxygen and as the catalyst in the hydration of ethylene.
- the majority of the pores are in the mesopore range.
- silica(AEROSIL) a volatile silicon compound is atomized into an oxyhydrogen flame comprising hydrogen and air.
- silicon tetrachloride is used. This substance hydrolyzes under the influence of the water produced in the oxyhydrogen gas reaction to form silicon dioxide and hydrochloric acid.
- the silicon dioxide After leaving the flame, the silicon dioxide enters a so-called coagulation zone, in which the silica(AEROSIL) primary particles and primary aggregates agglomerate.
- the product which at this stage is in the form of a type of aerosol, is separated in cyclones from the gaseous accompanying substances and subsequently after treated with moist hot air. This process reduces the residual hydrochloric acid content to below 0.025%.
- the silica(AEROSIL) is produced with a bulk density of only about 15 g/l
- the process is followed by a vacuum compression stage, by means of which compacted densities of about 50 g/l and more can be produced.
- the particle sizes of the products obtained in this way can be varied using the reaction conditions.
- Such parameters are, for example, the flame temperature, the proportions of hydrogen and oxygen, the amount of silicon tetrachloride, the residence time in the flame or the length of the coagulation zone.
- the BET surface area is determined in accordance with DIN 66 131 using nitrogen.
- the pore volume is computed from the sum of the micropore, mesopore and macropore volumes.
- the breaking strength is determined using a breaking tester from Ewerka Co., type TBH 28.
- micropores and mesopores are determined by recording an N 2 isotherm and evaluating same by the method BET, de Boer and Barret, Joyner, Halenda.
- the macropores are determined by the Hg penetration method. Any suitable pyrogenically prepared silica can be used for purposes of the invention although the above silica(AEROSIL) is preferred.
- the crude pellets are tempered by heating at 900° C. for 4 hours.
- Example 1 15% by weight of starch and molded into pellets as in Example 1.
- Example 1 4% by weight of wax are molded to form pellets as in Example 1.
- the tempering is carried out at 700° C.
- German priority application P 38 03 895.1-45 is relied on and incorporated herein.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Catalysts (AREA)
- Silicon Compounds (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Medicinal Preparation (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3803895 | 1988-02-09 | ||
| DE3803895A DE3803895C1 (de) | 1988-02-09 | 1988-02-09 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07308125 Continuation | 1989-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US5021378A true US5021378A (en) | 1991-06-04 |
Family
ID=6346975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/488,379 Expired - Fee Related US5021378A (en) | 1988-02-09 | 1990-02-23 | Molded articles based on pyrogenically prepared silicon dioxide, process for their production and their use |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5021378A (de) |
| EP (1) | EP0327722B1 (de) |
| JP (1) | JPH0674170B2 (de) |
| AT (1) | ATE94521T1 (de) |
| BR (1) | BR8900518A (de) |
| DE (2) | DE3803895C1 (de) |
| ES (1) | ES2059483T3 (de) |
| MX (1) | MX14843A (de) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858906A (en) * | 1994-08-04 | 1999-01-12 | Degussa Aktiengesellschaft | Compacts based on pyrogenically produced oxides |
| WO2000072966A1 (en) * | 1999-05-28 | 2000-12-07 | Grace Gmbh & Co. Kg | Shaped articles of silica gel and porous, amorphous mixed oxides |
| US6207610B1 (en) * | 1996-05-17 | 2001-03-27 | Degussa-Huls Ag | Compacts based on pyrogenically produced silicon dioxide |
| US6328944B1 (en) * | 1996-12-05 | 2001-12-11 | Degussa Ag | Doped, pyrogenically prepared oxides |
| US6432869B1 (en) * | 1998-09-24 | 2002-08-13 | Degussa Ag | Moldings including pyrogenic mixed oxide and the use thereof |
| SG94804A1 (en) * | 2000-04-12 | 2003-03-18 | Degussa | Dispersions |
| US20030082300A1 (en) * | 2001-02-12 | 2003-05-01 | Todd Michael A. | Improved Process for Deposition of Semiconductor Films |
| US6593270B1 (en) | 1997-11-13 | 2003-07-15 | Degussa Ag | Moldings based on pyrogenic silicon dioxide |
| US6679945B2 (en) * | 2000-08-21 | 2004-01-20 | Degussa Ag | Pyrogenically prepared silicon dioxide |
| WO2006000734A1 (en) * | 2004-06-23 | 2006-01-05 | Bp P.L.C. | The synthesis of the micro-porous silica gel and its application to the preparation of catalysts for c2 oxygenates synthesis from syngas |
| US20080249331A1 (en) * | 2005-06-24 | 2008-10-09 | Bp Chemicals Limited | Vinyl Acetate Catalyst and Support |
| US20100022796A1 (en) * | 2006-12-13 | 2010-01-28 | Wacker Chemie Ag | Method for producing catalysts and their use for the gas phase oxidation of olefins |
| US20100029473A1 (en) * | 2006-12-13 | 2010-02-04 | Wacker Chemie Ag | Method for the production of stable binder-free high-purity moldings composed of metal oxides and their use |
| US20100144519A1 (en) * | 2006-12-13 | 2010-06-10 | Wacker Chemie Ag | Method for producing stable, high-purity molded bodies from pyrogenic metal oxides without the addition of binders |
| CN102295472A (zh) * | 2009-11-23 | 2011-12-28 | 哈尔滨工业大学 | 一种呈等级孔结构且宏孔单向排列氧化硅陶瓷的制备方法 |
| CN102701225A (zh) * | 2012-03-20 | 2012-10-03 | 中国科学院山西煤炭化学研究所 | 一种淀粉改性二氧化硅材料的制备方法 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3912504A1 (de) * | 1989-04-17 | 1990-10-18 | Degussa | Presslinge auf basis von pyrogen hergestelltem siliciumdioxid, verfahren zu ihrer herstellung und ihre verwendung |
| US5108975A (en) * | 1991-01-28 | 1992-04-28 | Phillips Petroleum Company | Composition and method of making high porosity, high strength compositions |
| DE4142898A1 (de) * | 1991-12-23 | 1993-06-24 | Sued Chemie Ag | Formlinge auf der basis von pyrogener kieselsaeure |
| DE4142902A1 (de) * | 1991-12-23 | 1993-06-24 | Sued Chemie Ag | Formlinge auf der basis von pyrogener kieselsaeure |
| DE4242227A1 (de) * | 1992-12-15 | 1994-06-16 | Heraeus Quarzglas | Katalysatorträger und Verfahren für seine Herstellung |
| IT1282267B1 (it) * | 1995-03-14 | 1998-03-16 | Montecatini Tecnologie Srl | Catalizzatori e supporti per catalizzatori ottenuti per pastigliatura |
| DE19619961A1 (de) * | 1996-05-17 | 1997-11-20 | Degussa | Preßlinge auf Basis von pyrogen hergestelltem Siliciumdioxid |
| DE19828491A1 (de) * | 1998-06-26 | 1999-12-30 | Degussa | Formkörper auf Basis von Siliciumdioxid |
| MY131860A (en) | 2000-06-21 | 2007-09-28 | Shell Int Research | Process for preparation of catalyst and use there of |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524490A (en) * | 1975-06-27 | 1977-01-13 | Kuraray Co Ltd | Catalyst carrier |
| US4325846A (en) * | 1980-01-30 | 1982-04-20 | Kozo Shibata | Adsorbent materials for oils and fats |
| US4764498A (en) * | 1982-01-09 | 1988-08-16 | Bayer Aktiengesellschaft | Silica-containing shaped articles and a process for their preparation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1543576A (en) * | 1975-06-10 | 1979-04-04 | Bp Chem Int Ltd | Catalyst support |
| NL8005856A (nl) * | 1980-10-24 | 1982-05-17 | Stamicarbon | Bereiding van poreus, zuiver siliciumdioxyde en van chroomoxyde-op-siliciumdioxyde katalysatoren. |
| US4617060A (en) * | 1984-04-23 | 1986-10-14 | Mallinckrodt, Inc. | Silica catalyst supports |
-
1988
- 1988-02-09 DE DE3803895A patent/DE3803895C1/de not_active Expired
- 1988-12-23 AT AT88121566T patent/ATE94521T1/de not_active IP Right Cessation
- 1988-12-23 ES ES88121566T patent/ES2059483T3/es not_active Expired - Lifetime
- 1988-12-23 EP EP88121566A patent/EP0327722B1/de not_active Expired - Lifetime
- 1988-12-23 DE DE88121566T patent/DE3884182D1/de not_active Expired - Fee Related
-
1989
- 1989-02-03 BR BR898900518A patent/BR8900518A/pt not_active IP Right Cessation
- 1989-02-07 JP JP1026817A patent/JPH0674170B2/ja not_active Expired - Lifetime
- 1989-02-08 MX MX1484389A patent/MX14843A/es unknown
-
1990
- 1990-02-23 US US07/488,379 patent/US5021378A/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524490A (en) * | 1975-06-27 | 1977-01-13 | Kuraray Co Ltd | Catalyst carrier |
| US4325846A (en) * | 1980-01-30 | 1982-04-20 | Kozo Shibata | Adsorbent materials for oils and fats |
| US4764498A (en) * | 1982-01-09 | 1988-08-16 | Bayer Aktiengesellschaft | Silica-containing shaped articles and a process for their preparation |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858906A (en) * | 1994-08-04 | 1999-01-12 | Degussa Aktiengesellschaft | Compacts based on pyrogenically produced oxides |
| US6207610B1 (en) * | 1996-05-17 | 2001-03-27 | Degussa-Huls Ag | Compacts based on pyrogenically produced silicon dioxide |
| US6328944B1 (en) * | 1996-12-05 | 2001-12-11 | Degussa Ag | Doped, pyrogenically prepared oxides |
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| US20110224072A1 (en) * | 2006-12-13 | 2011-09-15 | Wacker Chemie Ag | Method For The Production Of Stable Binder-Free High-Purity Mouldings Composed Of Metal Oxides and Their Use |
| US20100029473A1 (en) * | 2006-12-13 | 2010-02-04 | Wacker Chemie Ag | Method for the production of stable binder-free high-purity moldings composed of metal oxides and their use |
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| US8518850B2 (en) | 2006-12-13 | 2013-08-27 | Wacker Chemie Ag | Method for the production of stable binder-free high-purity mouldings composed of metal oxides and their use |
| US9044742B2 (en) | 2006-12-13 | 2015-06-02 | Wacker Chemie Ag | Method for producing stable, high-purity molded bodies from pyrogenic metal oxides without the addition of binders |
| US9199230B2 (en) | 2006-12-13 | 2015-12-01 | Wacker Chemie Ag | Method for the production of stable binder-free high-purity moldings composed of metal oxides and their use |
| CN102295472A (zh) * | 2009-11-23 | 2011-12-28 | 哈尔滨工业大学 | 一种呈等级孔结构且宏孔单向排列氧化硅陶瓷的制备方法 |
| CN102295472B (zh) * | 2009-11-23 | 2012-12-05 | 哈尔滨工业大学 | 一种呈等级孔结构且宏孔单向排列氧化硅陶瓷的制备方法 |
| CN102701225A (zh) * | 2012-03-20 | 2012-10-03 | 中国科学院山西煤炭化学研究所 | 一种淀粉改性二氧化硅材料的制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0327722B1 (de) | 1993-09-15 |
| ATE94521T1 (de) | 1993-10-15 |
| JPH01234355A (ja) | 1989-09-19 |
| JPH0674170B2 (ja) | 1994-09-21 |
| DE3803895C1 (de) | 1989-04-13 |
| BR8900518A (pt) | 1989-10-03 |
| ES2059483T3 (es) | 1994-11-16 |
| DE3884182D1 (de) | 1993-10-21 |
| MX14843A (es) | 1994-02-28 |
| EP0327722A2 (de) | 1989-08-16 |
| EP0327722A3 (en) | 1989-10-11 |
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